/* ========== 设计令牌（Design Tokens）========== */
      :root {
        /* 色彩系统：深海军蓝 × 暖金（科技感 + 品质感） */
        --c-ink-900: #0a1628; /* 主深色 */
        --c-ink-800: #0f1f38; /* 深色面板 */
        --c-ink-700: #1a2b47; /* 次级深色 */
        --c-ink-600: #2a3d5c;
        --c-ink-500: #3d5275;
        --c-line-200: #e5e9f0;
        --c-line-100: #eef1f6;
        --c-paper: #faf8f3; /* 暖米白 */
        --c-paper-2: #f4f1e8; /* 暖灰米色 */
        --c-gold: #c9a961; /* 沉稳金 */
        --c-gold-2: #e2c989; /* 亮金 */
        --c-gold-3: #8a6f3d; /* 深金 */
        --c-text: #1a2438;
        --c-muted: #5a6478;
        --c-success: #3e8e5a;
        --c-danger: #b54545;
        /* 渐变 */
        --g-hero:
          radial-gradient(
            1200px 600px at 80% -10%,
            rgba(201, 169, 97, 0.18) 0%,
            transparent 60%
          ),
          radial-gradient(
            900px 500px at 10% 20%,
            rgba(64, 108, 178, 0.22) 0%,
            transparent 55%
          ),
          linear-gradient(180deg, #0a1628 0%, #0f1f38 100%);
        --g-gold: linear-gradient(
          135deg,
          #e2c989 0%,
          #c9a961 45%,
          #8a6f3d 100%
        );
        --g-text: linear-gradient(
          135deg,
          #e2c989 0%,
          #c9a961 50%,
          #f2dca8 100%
        );
        /* 字体（均使用开源免费字体） */
        --f-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
        --f-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
        /* 半径/阴影 */
        --r-sm: 8px;
        --r-md: 14px;
        --r-lg: 20px;
        --r-xl: 28px;
        --r-pill: 999px;
        --sh-1: 0 2px 10px rgba(10, 22, 40, 0.06);
        --sh-2: 0 10px 30px rgba(10, 22, 40, 0.1);
        --sh-3: 0 30px 60px rgba(10, 22, 40, 0.18);
        /* 容器 */
        --container: 1240px;
      }

      /* ========== 基础重置 ========== */
      *,
      *::before,
      *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }
      html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
      }
      body {
        font-family: var(--f-sans);
        color: var(--c-text);
        background: var(--c-paper);
        line-height: 1.75;
        font-size: 15px;
        letter-spacing: 0.01em;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
      }
      img {
        max-width: 100%;
        display: block;
        height: auto;
        loading: lazy;
      }
      a {
        color: inherit;
        text-decoration: none;
        transition:
          color 0.25s ease,
          opacity 0.25s ease;
      }
      a:hover {
        color: var(--c-gold-3);
      }
      button {
        font-family: inherit;
        cursor: pointer;
        border: none;
        background: none;
      }
      ul,
      ol {
        list-style: none;
      }
      h1,
      h2,
      h3,
      h4,
      h5 {
        font-family: var(--f-serif);
        font-weight: 700;
        line-height: 1.3;
        color: var(--c-ink-900);
        letter-spacing: 0.005em;
      }

      /* ========== 通用容器 ========== */
      .wrap {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
      }
      .section {
        padding: 88px 0;
        position: relative;
      }
      .section-sm {
        padding: 60px 0;
      }
      .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        font-size: 11.5px;
        letter-spacing: 0.32em;
        text-transform: uppercase;
        color: var(--c-gold-3);
        font-weight: 600;
        padding: 4px 0;
      }
      .eyebrow::before {
        content: "";
        width: 32px;
        height: 1px;
        background: currentColor;
        opacity: 0.65;
      }
      .section-title {
        font-size: clamp(26px, 3.2vw, 40px);
        margin: 16px 0 16px;
        color: var(--c-ink-900);
        letter-spacing: -0.005em;
        line-height: 1.28;
        font-weight: 700;
      }
      .section-sub {
        color: var(--c-muted);
        font-size: 15.5px;
        max-width: 720px;
        margin: 0 auto 48px;
        line-height: 1.85;
        letter-spacing: 0.01em;
      }
      .center {
        text-align: center;
      }

      /* ========== 顶部条 ========== */
      .topbar {
        background: linear-gradient(90deg, #0a1628, #0f1f38);
        color: #c9d3e5;
        font-size: 13px;
        border-bottom: 1px solid rgba(201, 169, 97, 0.18);
      }
      .topbar .wrap {
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 38px;
        flex-wrap: wrap;
        gap: 8px;
      }
      .topbar a {
        color: #d8e1f0;
        opacity: 0.85;
        display: inline-flex;
        align-items: center;
        gap: 6px;
      }
      .topbar a:hover {
        opacity: 1;
        color: var(--c-gold-2);
      }
      .topbar .tb-left,
      .topbar .tb-right {
        display: flex;
        align-items: center;
        gap: 18px;
        flex-wrap: wrap;
      }
      .topbar .tb-sep {
        opacity: 0.3;
      }
      .topbar svg {
        width: 14px;
        height: 14px;
        flex: none;
      }

      /* ========== 导航（粘性 + 与 Banner 一体化） ========== */
      .header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(10, 22, 40, 0.78);
        backdrop-filter: saturate(160%) blur(14px);
        -webkit-backdrop-filter: saturate(160%) blur(14px);
        border-bottom: 1px solid rgba(201, 169, 97, 0.18);
        transition: all 0.35s ease;
      }
      .header .wrap {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 78px;
        gap: 24px;
      }
      /* LOGO */
      .logo {
        display: flex;
        align-items: center;
        gap: 14px;
        color: #fff;
        flex: none;
      }
      .logo-mark {
        display: flex;
        align-items: center;
        gap: 6px;
        font-family: var(--f-serif);
        font-weight: 700;
        font-size: 22px;
        letter-spacing: 0.04em;
        position: relative;
        white-space: nowrap;
      }
      .logo-mark .brand {
        color: #fff;
        position: relative;
        display: inline-block;
      }
      .logo-mark .r-mark {
        font-size: 10px;
        font-weight: 600;
        color: var(--c-gold-2);
        margin-left: 1px;
        font-family: var(--f-sans);
        line-height: 1;
        letter-spacing: 0;
        vertical-align: super;
        opacity: 0.95;
      }
      .logo-mark .divider {
        display: inline-block;
        width: 1px;
        height: 22px;
        background: rgba(201, 169, 97, 0.55);
        margin: 0 6px;
      }
      .logo-mark .biz {
        font-family: var(--f-serif);
        font-size: 20px;
        color: var(--c-gold-2);
        background: var(--g-text);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        color: transparent;
        font-weight: 600;
        letter-spacing: 0.06em;
      }
      .logo-tagline {
        font-size: 11px;
        color: rgba(255, 255, 255, 0.55);
        letter-spacing: 0.2em;
        border-top: 1px solid rgba(201, 169, 97, 0.25);
        padding-top: 4px;
        margin-top: 2px;
      }

      /* 导航菜单 */
      .nav {
        display: flex;
        align-items: center;
        gap: 4px;
        flex: 1;
        justify-content: flex-end;
        margin-right: 12px;
      }
      .nav a {
        display: inline-block;
        padding: 10px 13px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.82);
        font-weight: 500;
        border-radius: var(--r-sm);
        position: relative;
        transition: all 0.25s ease;
        white-space: nowrap;
        letter-spacing: 0.02em;
      }
      .nav a:hover,
      .nav a.active {
        color: #fff;
      }
      .nav a::after {
        content: "";
        position: absolute;
        left: 50%;
        bottom: 4px;
        width: 0;
        height: 2px;
        background: var(--g-gold);
        border-radius: 2px;
        transition: all 0.3s ease;
        transform: translateX(-50%);
      }
      .nav a:hover::after,
      .nav a.active::after {
        width: 22px;
      }
      .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 22px;
        background: var(--g-gold);
        color: #0a1628 !important;
        border-radius: var(--r-pill);
        font-weight: 700;
        font-size: 13.5px;
        box-shadow: 0 6px 20px rgba(201, 169, 97, 0.35);
        letter-spacing: 0.02em;
      }
      .nav-cta:hover {
        transform: translateY(-1px);
        box-shadow: 0 10px 24px rgba(201, 169, 97, 0.45);
        color: #0a1628 !important;
      }
      .nav-cta::after {
        display: none;
      }

      /* 移动端菜单按钮 */
      .menu-btn {
        display: none;
        width: 42px;
        height: 42px;
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
        align-items: center;
        justify-content: center;
      }
      .menu-btn span {
        position: relative;
        width: 20px;
        height: 2px;
        background: #fff;
        display: block;
      }
      .menu-btn span::before,
      .menu-btn span::after {
        content: "";
        position: absolute;
        left: 0;
        width: 20px;
        height: 2px;
        background: #fff;
        transition: 0.3s;
      }
      .menu-btn span::before {
        top: -6px;
      }
      .menu-btn span::after {
        top: 6px;
      }
      .menu-btn.open span {
        background: transparent;
      }
      .menu-btn.open span::before {
        top: 0;
        transform: rotate(45deg);
      }
      .menu-btn.open span::after {
        top: 0;
        transform: rotate(-45deg);
      }

      /* ========== HERO BANNER（一大气动态渲染） ========== */
      .hero {
        position: relative;
        color: #fff;
        background: var(--g-hero);
        overflow: hidden;
        min-height: 660px;
        display: flex;
        align-items: center;
        padding: 110px 0 100px;
      }
      .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image:
          linear-gradient(rgba(201, 169, 97, 0.05) 1px, transparent 1px),
          linear-gradient(90deg, rgba(201, 169, 97, 0.05) 1px, transparent 1px);
        background-size: 60px 60px;
        mask-image: radial-gradient(
          ellipse 80% 60% at 50% 40%,
          #000 30%,
          transparent 80%
        );
        -webkit-mask-image: radial-gradient(
          ellipse 80% 60% at 50% 40%,
          #000 30%,
          transparent 80%
        );
        pointer-events: none;
      }
      .hero-orb {
        position: absolute;
        border-radius: 50%;
        filter: blur(60px);
        opacity: 0.55;
        pointer-events: none;
        mix-blend-mode: screen;
      }
      .hero-orb.o1 {
        width: 480px;
        height: 480px;
        background: radial-gradient(circle, #c9a961 0%, transparent 70%);
        top: -120px;
        right: -100px;
        animation: float 14s ease-in-out infinite;
      }
      .hero-orb.o2 {
        width: 380px;
        height: 380px;
        background: radial-gradient(circle, #3d6bb5 0%, transparent 70%);
        bottom: -100px;
        left: -80px;
        animation: float 18s ease-in-out infinite reverse;
      }
      .hero-orb.o3 {
        width: 260px;
        height: 260px;
        background: radial-gradient(circle, #6b8dd6 0%, transparent 70%);
        top: 40%;
        left: 35%;
        animation: float 22s ease-in-out infinite;
      }
      @keyframes float {
        0%,
        100% {
          transform: translate(0, 0) scale(1);
        }
        50% {
          transform: translate(30px, -20px) scale(1.05);
        }
      }

      /* 流光线条 */
      .hero-lines {
        position: absolute;
        inset: 0;
        pointer-events: none;
        overflow: hidden;
        opacity: 0.5;
      }
      .hero-lines::before,
      .hero-lines::after {
        content: "";
        position: absolute;
        height: 1px;
        width: 60%;
        left: 20%;
        background: linear-gradient(
          90deg,
          transparent,
          rgba(226, 201, 137, 0.6),
          transparent
        );
        animation: scan 7s linear infinite;
      }
      .hero-lines::after {
        top: auto;
        bottom: 30%;
        animation-delay: 3.5s;
        width: 80%;
        left: 10%;
      }
      @keyframes scan {
        0% {
          transform: translateX(-100%);
          opacity: 0;
        }
        20%,
        80% {
          opacity: 1;
        }
        100% {
          transform: translateX(100%);
          opacity: 0;
        }
      }

      /* 粒子 */
      .particles {
        position: absolute;
        inset: 0;
        pointer-events: none;
      }
      .particle {
        position: absolute;
        width: 3px;
        height: 3px;
        background: var(--c-gold-2);
        border-radius: 50%;
        box-shadow: 0 0 8px var(--c-gold-2);
        opacity: 0;
        animation: rise 8s linear infinite;
      }
      @keyframes rise {
        0% {
          transform: translateY(0) translateX(0);
          opacity: 0;
        }
        10% {
          opacity: 0.9;
        }
        90% {
          opacity: 0.9;
        }
        100% {
          transform: translateY(-700px) translateX(var(--dx, 20px));
          opacity: 0;
        }
      }

      .hero-grid {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 64px;
        align-items: center;
      }
      .hero-text .eyebrow {
        color: var(--c-gold-2);
      }
      .hero-text .eyebrow::before {
        background: var(--c-gold-2);
      }
      .hero h1 {
        font-size: clamp(34px, 4.4vw, 54px);
        line-height: 1.2;
        color: #fff;
        margin: 18px 0 22px;
        font-weight: 900;
        letter-spacing: -0.01em;
      }
      .hero h1 .grad {
        background: var(--g-text);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        color: transparent;
        position: relative;
        display: inline-block;
      }
      .hero h1 .grad::after {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: -8px;
        height: 3px;
        background: var(--g-gold);
        border-radius: 2px;
        opacity: 0.85;
      }
      .hero .lead {
        font-size: 16.5px;
        color: rgba(255, 255, 255, 0.78);
        max-width: 600px;
        margin-bottom: 28px;
        line-height: 1.85;
        letter-spacing: 0.015em;
      }
      .hero-keywords {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 32px;
      }
      .hero-keywords span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 14px;
        background: rgba(201, 169, 97, 0.1);
        border: 1px solid rgba(201, 169, 97, 0.3);
        border-radius: var(--r-pill);
        font-size: 12.5px;
        color: var(--c-gold-2);
        font-weight: 500;
        letter-spacing: 0.02em;
        backdrop-filter: blur(8px);
      }
      .hero-keywords span::before {
        content: "";
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: var(--c-gold-2);
      }

      .hero-cta {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
        margin-bottom: 38px;
      }
      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 14px 28px;
        border-radius: var(--r-pill);
        font-weight: 700;
        font-size: 14.5px;
        transition: all 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
        letter-spacing: 0.02em;
      }
      .btn-primary {
        background: var(--g-gold);
        color: #0a1628;
        box-shadow: 0 10px 28px rgba(201, 169, 97, 0.35);
      }
      .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 16px 36px rgba(201, 169, 97, 0.5);
        color: #0a1628;
      }
      .btn-ghost {
        background: rgba(255, 255, 255, 0.06);
        color: #fff;
        border: 1px solid rgba(255, 255, 255, 0.25);
      }
      .btn-ghost:hover {
        background: rgba(255, 255, 255, 0.12);
        color: #fff;
        border-color: var(--c-gold-2);
      }
      .btn svg {
        width: 18px;
        height: 18px;
      }

      .hero-trust {
        display: flex;
        gap: 40px;
        flex-wrap: wrap;
        padding-top: 28px;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
      }
      .trust-item {
        display: flex;
        flex-direction: column;
        gap: 6px;
      }
      .trust-item .num {
        font-family: var(--f-serif);
        font-size: 28px;
        font-weight: 900;
        color: var(--c-gold-2);
        line-height: 1;
        letter-spacing: -0.01em;
      }
      .trust-item .lbl {
        font-size: 11.5px;
        color: rgba(255, 255, 255, 0.6);
        letter-spacing: 0.16em;
        font-weight: 500;
      }

      /* HERO 右侧：AI 平台浮动卡片 */
      .hero-visual {
        position: relative;
        height: 520px;
      }
      .ai-orbit {
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .orbit-ring {
        position: absolute;
        border: 1px dashed rgba(201, 169, 97, 0.25);
        border-radius: 50%;
        animation: spin 60s linear infinite;
      }
      .orbit-ring.r1 {
        width: 380px;
        height: 380px;
      }
      .orbit-ring.r2 {
        width: 500px;
        height: 500px;
        animation-duration: 80s;
        animation-direction: reverse;
      }
      .orbit-ring.r3 {
        width: 620px;
        height: 620px;
        animation-duration: 120s;
        opacity: 0.5;
      }
      @keyframes spin {
        to {
          transform: rotate(360deg);
        }
      }

      .ai-core {
        position: relative;
        width: 160px;
        height: 160px;
        border-radius: 50%;
        background: linear-gradient(135deg, #0f1f38, #0a1628);
        border: 1px solid rgba(201, 169, 97, 0.4);
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow:
          0 0 60px rgba(201, 169, 97, 0.35),
          inset 0 0 30px rgba(201, 169, 97, 0.15);
      }
      .ai-core::before {
        content: "";
        position: absolute;
        inset: -12px;
        border-radius: 50%;
        border: 1px solid rgba(201, 169, 97, 0.25);
        animation: pulse 3s ease-in-out infinite;
      }
      @keyframes pulse {
        0%,
        100% {
          transform: scale(1);
          opacity: 0.6;
        }
        50% {
          transform: scale(1.06);
          opacity: 1;
        }
      }
      .ai-core-text {
        font-family: var(--f-serif);
        font-size: 28px;
        font-weight: 900;
        color: var(--c-gold-2);
        text-align: center;
        line-height: 1.1;
      }
      .ai-core-sub {
        font-size: 11px;
        color: rgba(255, 255, 255, 0.6);
        letter-spacing: 0.2em;
        margin-top: 4px;
      }

      .ai-platform {
        position: absolute;
        width: 88px;
        height: 88px;
        border-radius: 18px;
        background: linear-gradient(135deg, #1a2b47, #0f1f38);
        border: 1px solid rgba(201, 169, 97, 0.3);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
        transition: transform 0.35s ease;
        animation: floatY 6s ease-in-out infinite;
      }
      .ai-platform:hover {
        transform: scale(1.08) translateY(-4px);
        border-color: var(--c-gold-2);
      }
      .ai-platform .ic {
        font-size: 28px;
        line-height: 1;
        margin-bottom: 6px;
      }
      .ai-platform .nm {
        font-size: 11px;
        color: #fff;
        font-weight: 600;
        letter-spacing: 0.05em;
      }
      @keyframes floatY {
        0%,
        100% {
          transform: translateY(0);
        }
        50% {
          transform: translateY(-8px);
        }
      }

      /* ========== 信任条 ========== */
      .trust-bar {
        background: #fff;
        border-top: 1px solid var(--c-line-100);
        border-bottom: 1px solid var(--c-line-100);
        padding: 30px 0;
      }
      .trust-bar .wrap {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        align-items: center;
      }
      .tb-item {
        display: flex;
        align-items: center;
        gap: 14px;
        color: var(--c-ink-700);
        font-size: 13.5px;
      }
      .tb-item .ic {
        width: 46px;
        height: 46px;
        border-radius: 12px;
        background: linear-gradient(135deg, #f4f1e8, #faf8f3);
        border: 1px solid rgba(201, 169, 97, 0.3);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--c-gold-3);
        font-family: var(--f-serif);
        font-weight: 900;
        font-size: 19px;
        flex: none;
      }
      .tb-item strong {
        font-weight: 700;
        color: var(--c-ink-900);
        font-size: 14px;
        letter-spacing: 0.005em;
      }

      /* ========== 板块：什么是 GEO ========== */
      .intro {
        background: var(--c-paper);
      }
      .intro-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
      }
      .intro-left .eyebrow {
        color: var(--c-gold-3);
      }
      .intro-left h2 {
        font-size: clamp(26px, 3.2vw, 38px);
        margin: 14px 0 20px;
        line-height: 1.3;
        font-weight: 700;
      }
      .intro-left p {
        color: var(--c-text);
        font-size: 15px;
        margin-bottom: 16px;
        line-height: 1.9;
        letter-spacing: 0.01em;
      }
      .intro-left .hl {
        color: var(--c-gold-3);
        font-weight: 700;
      }
      .intro-points {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 28px;
      }
      .intro-pt {
        padding: 18px 20px;
        background: #fff;
        border-radius: var(--r-md);
        border: 1px solid var(--c-line-100);
        transition: all 0.3s;
      }
      .intro-pt:hover {
        border-color: var(--c-gold);
        transform: translateY(-3px);
        box-shadow: var(--sh-2);
      }
      .intro-pt .ti {
        font-weight: 700;
        color: var(--c-ink-900);
        margin-bottom: 6px;
        font-size: 14.5px;
        letter-spacing: 0.01em;
      }
      .intro-pt .de {
        color: var(--c-muted);
        font-size: 12.5px;
        line-height: 1.7;
        letter-spacing: 0.01em;
      }
      .intro-visual {
        position: relative;
        background: linear-gradient(135deg, #0a1628, #0f1f38);
        border-radius: var(--r-lg);
        padding: 34px 32px 32px;
        color: #fff;
        overflow: hidden;
        box-shadow: var(--sh-3);
      }
      .intro-visual::before {
        content: "";
        position: absolute;
        top: -100px;
        right: -100px;
        width: 300px;
        height: 300px;
        background: radial-gradient(
          circle,
          rgba(201, 169, 97, 0.3),
          transparent 70%
        );
        border-radius: 50%;
      }
      .iv-title {
        font-family: var(--f-serif);
        font-size: 12.5px;
        color: var(--c-gold-2);
        letter-spacing: 0.22em;
        margin-bottom: 20px;
        position: relative;
        font-weight: 600;
      }
      .iv-q {
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(201, 169, 97, 0.2);
        border-radius: var(--r-md);
        padding: 16px 18px;
        margin-bottom: 12px;
        position: relative;
      }
      .iv-q .lbl {
        font-size: 10.5px;
        color: var(--c-gold-2);
        letter-spacing: 0.18em;
        margin-bottom: 6px;
        font-weight: 600;
      }
      .iv-q .txt {
        font-size: 13.5px;
        color: rgba(255, 255, 255, 0.85);
        line-height: 1.65;
        letter-spacing: 0.01em;
      }
      .iv-q.a {
        background: rgba(201, 169, 97, 0.08);
        border-color: rgba(201, 169, 97, 0.45);
      }
      .iv-q.a .txt {
        color: #fff;
      }
      .iv-q .src {
        font-size: 11px;
        color: rgba(255, 255, 255, 0.45);
        margin-top: 8px;
        display: flex;
        align-items: center;
        gap: 6px;
      }
      .iv-q .src::before {
        content: "";
        width: 5px;
        height: 5px;
        border-radius: 50%;
        background: var(--c-gold-2);
      }

      /* ========== 板块：服务项目 3x2 ========== */
      .services {
        background: linear-gradient(180deg, #faf8f3 0%, #fff 100%);
      }
      .svc-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
      }
      .svc-card {
        background: #fff;
        border: 1px solid var(--c-line-100);
        border-radius: var(--r-lg);
        padding: 36px 30px 30px;
        transition: all 0.4s cubic-bezier(0.2, 0.7, 0.3, 1);
        position: relative;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        height: 100%;
      }
      .svc-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: var(--g-gold);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.4s ease;
      }
      .svc-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--sh-3);
        border-color: transparent;
      }
      .svc-card:hover::before {
        transform: scaleX(1);
      }
      .svc-num {
        font-family: var(--f-serif);
        font-size: 12px;
        color: var(--c-gold-3);
        letter-spacing: 0.28em;
        margin-bottom: 16px;
        font-weight: 600;
        opacity: 0.85;
      }
      .svc-ic {
        width: 56px;
        height: 56px;
        border-radius: 14px;
        background: linear-gradient(135deg, #0a1628, #0f1f38);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 20px;
        color: var(--c-gold-2);
        font-size: 24px;
        line-height: 1;
        box-shadow: 0 10px 24px rgba(10, 22, 40, 0.18);
      }
      .svc-card h3 {
        font-size: 19px;
        margin-bottom: 10px;
        color: var(--c-ink-900);
        font-weight: 700;
        line-height: 1.4;
        letter-spacing: 0.01em;
      }
      .svc-card p {
        color: var(--c-muted);
        font-size: 13.5px;
        line-height: 1.85;
        margin-bottom: 18px;
        flex: 1;
        letter-spacing: 0.01em;
      }
      .svc-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        margin-bottom: 20px;
      }
      .svc-tags span {
        padding: 4px 10px;
        background: #f4f1e8;
        color: var(--c-gold-3);
        font-size: 11.5px;
        border-radius: var(--r-pill);
        font-weight: 500;
        letter-spacing: 0.02em;
      }
      .svc-link {
        color: var(--c-gold-3);
        font-weight: 700;
        font-size: 12.5px;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        letter-spacing: 0.06em;
        margin-top: auto;
      }
      .svc-link::after {
        content: "→";
        transition: transform 0.3s;
      }
      .svc-card:hover .svc-link::after {
        transform: translateX(4px);
      }

      /* ========== 板块：AI 平台矩阵 ========== */
      .platforms {
        background: #0a1628;
        color: #fff;
        position: relative;
        overflow: hidden;
      }
      .platforms::before {
        content: "";
        position: absolute;
        top: 0;
        right: 0;
        width: 600px;
        height: 600px;
        background: radial-gradient(
          circle,
          rgba(201, 169, 97, 0.1),
          transparent 60%
        );
        pointer-events: none;
      }
      .platforms .section-title {
        color: #fff;
      }
      .platforms .section-sub {
        color: rgba(255, 255, 255, 0.65);
      }
      .platforms .eyebrow {
        color: var(--c-gold-2);
      }
      .platforms .eyebrow::before {
        background: var(--c-gold-2);
      }
      .pf-grid {
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        gap: 16px;
        position: relative;
        z-index: 1;
      }
      .pf-card {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(201, 169, 97, 0.18);
        border-radius: var(--r-md);
        padding: 24px 14px 20px;
        text-align: center;
        transition: all 0.35s;
        position: relative;
        overflow: hidden;
      }
      .pf-card::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          135deg,
          rgba(201, 169, 97, 0.1),
          transparent
        );
        opacity: 0;
        transition: opacity 0.35s;
      }
      .pf-card:hover {
        border-color: var(--c-gold-2);
        transform: translateY(-4px);
        background: rgba(255, 255, 255, 0.06);
      }
      .pf-card:hover::before {
        opacity: 1;
      }
      .pf-card .nm {
        font-family: var(--f-serif);
        font-size: 15.5px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 4px;
        position: relative;
        letter-spacing: 0.01em;
      }
      .pf-card .co {
        font-size: 11px;
        color: rgba(255, 255, 255, 0.45);
        letter-spacing: 0.12em;
        position: relative;
      }
      .pf-card .lg {
        font-size: 30px;
        margin-bottom: 10px;
        line-height: 1;
        position: relative;
      }

      /* ========== 板块：服务流程 ========== */
      .process {
        background: var(--c-paper);
      }
      .proc-grid {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 20px;
        position: relative;
      }
      .proc-grid::before {
        content: "";
        position: absolute;
        top: 36px;
        left: 8%;
        right: 8%;
        height: 2px;
        background: linear-gradient(
          90deg,
          transparent,
          var(--c-gold) 15%,
          var(--c-gold) 85%,
          transparent
        );
        z-index: 0;
      }
      .proc-step {
        text-align: center;
        position: relative;
        z-index: 1;
      }
      .proc-circle {
        width: 72px;
        height: 72px;
        border-radius: 50%;
        margin: 0 auto 20px;
        background: #fff;
        border: 2px solid var(--c-gold);
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: var(--f-serif);
        font-size: 24px;
        font-weight: 900;
        color: var(--c-gold-3);
        box-shadow: 0 6px 18px rgba(201, 169, 97, 0.25);
        transition: all 0.35s;
      }
      .proc-step:hover .proc-circle {
        transform: scale(1.08);
        background: var(--c-gold);
        color: #fff;
      }
      .proc-step h4 {
        font-size: 16.5px;
        margin-bottom: 8px;
        color: var(--c-ink-900);
        letter-spacing: 0.01em;
        font-weight: 700;
      }
      .proc-step p {
        font-size: 12.5px;
        color: var(--c-muted);
        line-height: 1.75;
        padding: 0 8px;
        letter-spacing: 0.01em;
      }

      /* ========== 板块：行业方案 3x2 ========== */
      .industries {
        background: linear-gradient(180deg, #fff 0%, #f4f1e8 100%);
      }
      .ind-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
      }
      .ind-card {
        position: relative;
        height: 280px;
        border-radius: var(--r-lg);
        overflow: hidden;
        display: flex;
        align-items: flex-end;
        padding: 30px 28px;
        color: #fff;
        background: #0a1628;
        transition: transform 0.4s ease, box-shadow 0.4s ease;
        border: 1px solid var(--c-line-100);
      }
      .ind-card .bg-art {
        position: absolute;
        inset: 0;
        z-index: 0;
        overflow: hidden;
        transition: transform 0.6s ease;
      }
      .ind-card .bg-art::before,
      .ind-card .bg-art::after {
        content: "";
        position: absolute;
        border-radius: 50%;
        filter: blur(40px);
        opacity: 0.55;
      }
      .ind-card .bg-art::before {
        width: 280px;
        height: 280px;
        top: -80px;
        right: -60px;
      }
      .ind-card .bg-art::after {
        width: 220px;
        height: 220px;
        bottom: -60px;
        left: -40px;
        opacity: 0.35;
      }
      .ind-card .bg-art .grid {
        position: absolute;
        inset: 0;
        background-image: linear-gradient(
            rgba(255, 255, 255, 0.05) 1px,
            transparent 1px
          ),
          linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
        background-size: 40px 40px;
        mask-image: radial-gradient(
          ellipse 60% 80% at 80% 30%,
          #000 20%,
          transparent 70%
        );
        -webkit-mask-image: radial-gradient(
          ellipse 60% 80% at 80% 30%,
          #000 20%,
          transparent 70%
        );
      }
      .ind-card .bg-art .glyph {
        position: absolute;
        font-family: var(--f-serif);
        font-size: 80px;
        font-weight: 900;
        color: rgba(255, 255, 255, 0.035);
        line-height: 1;
        letter-spacing: -0.04em;
        top: 50%;
        right: 6%;
        transform: translateY(-50%);
        font-style: italic;
        pointer-events: none;
        user-select: none;
        white-space: nowrap;
      }
      .ind-card.ind-1 .bg-art {
        background: linear-gradient(135deg, #0a1628 0%, #1a2b47 60%, #2a3d5c 100%);
      }
      .ind-card.ind-1 .bg-art::before {
        background: radial-gradient(circle, #c9a961, transparent 70%);
      }
      .ind-card.ind-1 .bg-art::after {
        background: radial-gradient(circle, #3d6bb5, transparent 70%);
      }
      .ind-card.ind-2 .bg-art {
        background: linear-gradient(135deg, #0f1f38 0%, #1f3457 60%, #2a4d7a 100%);
      }
      .ind-card.ind-2 .bg-art::before {
        background: radial-gradient(circle, #6b8dd6, transparent 70%);
      }
      .ind-card.ind-2 .bg-art::after {
        background: radial-gradient(circle, #c9a961, transparent 70%);
      }
      .ind-card.ind-3 .bg-art {
        background: linear-gradient(135deg, #1a2b47 0%, #0f1f38 60%, #1f3457 100%);
      }
      .ind-card.ind-3 .bg-art::before {
        background: radial-gradient(circle, #e2c989, transparent 70%);
      }
      .ind-card.ind-3 .bg-art::after {
        background: radial-gradient(circle, #5a7bae, transparent 70%);
      }
      .ind-card.ind-4 .bg-art {
        background: linear-gradient(135deg, #0a1628 0%, #1a2438 60%, #0f1f38 100%);
      }
      .ind-card.ind-4 .bg-art::before {
        background: radial-gradient(circle, #c9a961, transparent 70%);
      }
      .ind-card.ind-4 .bg-art::after {
        background: radial-gradient(circle, #8a6f3d, transparent 70%);
      }
      .ind-card.ind-5 .bg-art {
        background: linear-gradient(135deg, #0f1f38 0%, #1a2b47 60%, #2a3d5c 100%);
      }
      .ind-card.ind-5 .bg-art::before {
        background: radial-gradient(circle, #6b8dd6, transparent 70%);
      }
      .ind-card.ind-5 .bg-art::after {
        background: radial-gradient(circle, #e2c989, transparent 70%);
      }
      .ind-card.ind-6 .bg-art {
        background: linear-gradient(135deg, #1a2438 0%, #0f1f38 60%, #1a2b47 100%);
      }
      .ind-card.ind-6 .bg-art::before {
        background: radial-gradient(circle, #5a7bae, transparent 70%);
      }
      .ind-card.ind-6 .bg-art::after {
        background: radial-gradient(circle, #c9a961, transparent 70%);
      }
      .ind-card::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          180deg,
          rgba(10, 22, 40, 0.1) 0%,
          rgba(10, 22, 40, 0.85) 100%
        );
        z-index: 1;
        pointer-events: none;
      }
      .ind-card:hover .bg-art {
        transform: scale(1.06);
      }
      .ind-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--sh-3);
      }
      .ind-content {
        position: relative;
        z-index: 2;
        width: 100%;
      }
      .ind-content h3 {
        color: #fff;
        font-size: 20px;
        margin-bottom: 8px;
        font-family: var(--f-serif);
        font-weight: 700;
        letter-spacing: 0.01em;
        line-height: 1.35;
      }
      .ind-content p {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.85);
        line-height: 1.7;
        margin-bottom: 14px;
        letter-spacing: 0.01em;
      }
      .ind-content .more {
        font-size: 11.5px;
        color: var(--c-gold-2);
        font-weight: 600;
        letter-spacing: 0.16em;
        display: inline-flex;
        align-items: center;
        gap: 5px;
        text-transform: uppercase;
      }

      /* ========== 板块：为何选择我们 ========== */
      .why {
        background: linear-gradient(135deg, #0a1628 0%, #0f1f38 100%);
        color: #fff;
        position: relative;
        overflow: hidden;
      }
      .why::before {
        content: "";
        position: absolute;
        top: 50%;
        left: 50%;
        width: 800px;
        height: 800px;
        transform: translate(-50%, -50%);
        background: radial-gradient(
          circle,
          rgba(201, 169, 97, 0.08),
          transparent 60%
        );
        pointer-events: none;
      }
      .why .section-title {
        color: #fff;
        text-align: center;
      }
      .why .eyebrow {
        color: var(--c-gold-2);
        justify-content: center;
      }
      .why .eyebrow::before {
        background: var(--c-gold-2);
      }
      .why-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 48px;
        position: relative;
        z-index: 1;
      }
      .why-card {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(201, 169, 97, 0.2);
        border-radius: var(--r-md);
        padding: 32px 26px 28px;
        transition: all 0.4s;
        text-align: left;
        position: relative;
        overflow: hidden;
        min-height: 200px;
      }
      .why-card::before {
        content: "";
        position: absolute;
        top: -50%;
        right: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(
          circle,
          rgba(201, 169, 97, 0.1),
          transparent 50%
        );
        opacity: 0;
        transition: opacity 0.5s;
      }
      .why-card:hover {
        border-color: var(--c-gold-2);
        transform: translateY(-6px);
      }
      .why-card:hover::before {
        opacity: 1;
      }
      .why-num {
        font-family: var(--f-serif);
        font-size: 36px;
        font-weight: 900;
        background: var(--g-text);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        color: transparent;
        line-height: 1;
        margin-bottom: 16px;
        position: relative;
        letter-spacing: -0.02em;
      }
      .why-card h4 {
        color: #fff;
        font-size: 16.5px;
        margin-bottom: 8px;
        position: relative;
        font-weight: 700;
        letter-spacing: 0.01em;
      }
      .why-card p {
        color: rgba(255, 255, 255, 0.68);
        font-size: 13px;
        line-height: 1.8;
        position: relative;
        letter-spacing: 0.01em;
      }

      /* ========== 板块：FAQ（自动展开 12+） ========== */
      .faq {
        background: var(--c-paper);
      }
      .faq-list {
        max-width: 920px;
        margin: 0 auto;
      }
      .faq-item {
        background: #fff;
        border: 1px solid var(--c-line-100);
        border-radius: var(--r-md);
        margin-bottom: 12px;
        overflow: hidden;
        transition: all 0.3s ease;
      }
      .faq-item:hover {
        border-color: rgba(201, 169, 97, 0.4);
      }
      .faq-item.open {
        border-color: var(--c-gold);
        box-shadow: var(--sh-2);
      }
      .faq-q {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 18px;
        padding: 22px 28px;
        text-align: left;
        cursor: pointer;
        background: transparent;
        font-family: var(--f-sans);
        font-size: 15.5px;
        font-weight: 600;
        color: var(--c-ink-900);
        line-height: 1.6;
        letter-spacing: 0.01em;
      }
      .faq-q .num {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 34px;
        height: 34px;
        padding: 0 8px;
        background: #f4f1e8;
        color: var(--c-gold-3);
        border-radius: 8px;
        font-family: var(--f-serif);
        font-size: 13px;
        font-weight: 700;
        flex: none;
        letter-spacing: 0;
      }
      .faq-item.open .faq-q .num {
        background: var(--c-gold);
        color: #fff;
      }
      .faq-q .ttl {
        flex: 1;
      }
      .faq-q .ic {
        width: 30px;
        height: 30px;
        border-radius: 50%;
        background: #f4f1e8;
        color: var(--c-gold-3);
        display: flex;
        align-items: center;
        justify-content: center;
        flex: none;
        font-size: 18px;
        line-height: 1;
        transition: all 0.3s;
        font-weight: 300;
      }
      .faq-item.open .faq-q .ic {
        background: var(--c-gold);
        color: #fff;
        transform: rotate(45deg);
      }
      .faq-a {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.5s cubic-bezier(0.2, 0.7, 0.3, 1);
      }
      .faq-item.open .faq-a {
        max-height: 800px;
      }
      .faq-a-inner {
        padding: 4px 28px 26px 80px;
        color: var(--c-muted);
        font-size: 14px;
        line-height: 1.9;
        letter-spacing: 0.01em;
      }
      .faq-a-inner p {
        margin-bottom: 8px;
      }
      .faq-a-inner p:last-child {
        margin-bottom: 0;
      }

      /* ========== 板块：联系方式 ========== */
      .contact {
        background: linear-gradient(180deg, #faf8f3 0%, #f4f1e8 100%);
      }
      .contact-grid {
        display: grid;
        grid-template-columns: 1.15fr 0.95fr;
        gap: 32px;
        align-items: stretch;
      }
      .contact-card {
        background: #fff;
        border-radius: var(--r-lg);
        padding: 48px 44px 44px;
        box-shadow: var(--sh-2);
        border: 1px solid var(--c-line-100);
        position: relative;
        overflow: hidden;
        display: flex;
        flex-direction: column;
      }
      .contact-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--g-gold);
      }
      .contact-card h3 {
        font-size: 23px;
        margin-bottom: 8px;
        color: var(--c-ink-900);
        font-weight: 700;
        letter-spacing: 0.01em;
      }
      .contact-card .lead {
        color: var(--c-muted);
        font-size: 13.5px;
        margin-bottom: 28px;
        line-height: 1.7;
        letter-spacing: 0.01em;
      }
      .contact-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 14px;
        margin-bottom: 28px;
        flex: 1;
      }
      .ci {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        padding: 16px 18px;
        background: #faf8f3;
        border-radius: var(--r-md);
        border: 1px solid var(--c-line-100);
        transition: all 0.25s;
      }
      .ci:hover {
        border-color: var(--c-gold);
        background: #fff;
        box-shadow: var(--sh-1);
      }
      .ci .ic {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: var(--c-ink-900);
        color: var(--c-gold-2);
        display: flex;
        align-items: center;
        justify-content: center;
        flex: none;
        font-size: 16px;
      }
      .ci .lbl {
        font-size: 11px;
        color: var(--c-muted);
        letter-spacing: 0.14em;
        margin-bottom: 4px;
        text-transform: uppercase;
        font-weight: 600;
      }
      .ci .val {
        font-size: 14px;
        color: var(--c-ink-900);
        font-weight: 600;
        line-height: 1.45;
        word-break: break-all;
        letter-spacing: 0.005em;
      }
      .ci .val a {
        color: var(--c-ink-900);
      }
      .ci .val a:hover {
        color: var(--c-gold-3);
      }

      /* 二维码 + 微博 */
      .qr-side {
        background: linear-gradient(135deg, #0a1628, #0f1f38);
        color: #fff;
        border-radius: var(--r-lg);
        padding: 44px 38px 38px;
        position: relative;
        overflow: hidden;
        box-shadow: var(--sh-3);
        display: flex;
        flex-direction: column;
      }
      .qr-side::before {
        content: "";
        position: absolute;
        top: -100px;
        right: -100px;
        width: 280px;
        height: 280px;
        background: radial-gradient(
          circle,
          rgba(201, 169, 97, 0.3),
          transparent 70%
        );
        border-radius: 50%;
      }
      .qr-grid {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 22px;
        align-items: center;
        position: relative;
        margin-bottom: 22px;
      }
      .qr-img {
        width: 132px;
        height: 132px;
        background: #fff;
        border-radius: 12px;
        padding: 7px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex: none;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
      }
      .qr-img img {
        width: 100%;
        height: 100%;
        object-fit: contain;
      }
      .qr-txt .t1 {
        font-family: var(--f-serif);
        font-size: 21px;
        font-weight: 700;
        margin-bottom: 8px;
        letter-spacing: 0.01em;
      }
      .qr-txt .t2 {
        font-size: 12.5px;
        color: rgba(255, 255, 255, 0.7);
        line-height: 1.7;
        margin-bottom: 12px;
        letter-spacing: 0.01em;
      }
      .qr-txt .t2 strong {
        color: var(--c-gold-2);
      }
      .weibo-link {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 11px 20px;
        background: rgba(201, 169, 97, 0.15);
        border: 1px solid rgba(201, 169, 97, 0.4);
        border-radius: var(--r-pill);
        color: #fff;
        font-size: 13px;
        font-weight: 500;
        transition: all 0.25s;
        letter-spacing: 0.02em;
      }
      .weibo-link:hover {
        background: var(--c-gold);
        color: #0a1628;
        border-color: var(--c-gold);
      }
      .map-box {
        margin-top: 22px;
        padding-top: 22px;
        border-top: 1px solid rgba(255, 255, 255, 0.12);
        display: flex;
        align-items: flex-start;
        gap: 12px;
        position: relative;
      }
      .map-box .ic {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: rgba(201, 169, 97, 0.15);
        color: var(--c-gold-2);
        display: flex;
        align-items: center;
        justify-content: center;
        flex: none;
        font-size: 17px;
      }
      .map-box .addr {
        font-size: 13.5px;
        line-height: 1.7;
        color: rgba(255, 255, 255, 0.85);
        letter-spacing: 0.01em;
      }
      .map-box .addr strong {
        display: block;
        color: #fff;
        font-weight: 600;
        margin-bottom: 4px;
        font-size: 14.5px;
      }

      /* ========== 底部 / Footer ========== */
      .footer {
        background: #07101f;
        color: rgba(255, 255, 255, 0.7);
        padding: 68px 0 0;
        font-size: 13.5px;
      }
      .footer-top {
        display: grid;
        grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
        gap: 44px;
        padding-bottom: 44px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      }
      .footer-col h5 {
        color: #fff;
        font-family: var(--f-serif);
        font-size: 14.5px;
        font-weight: 700;
        margin-bottom: 20px;
        letter-spacing: 0.06em;
        position: relative;
        padding-bottom: 12px;
      }
      .footer-col h5::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 24px;
        height: 2px;
        background: var(--c-gold);
      }
      .footer-col ul li {
        margin-bottom: 10px;
        line-height: 1.7;
      }
      .footer-col .city-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 2px 14px;
        margin-top: 4px;
      }
      .footer-col .city-list li {
        margin-bottom: 6px;
        line-height: 1.55;
        position: relative;
        padding-left: 12px;
      }
      .footer-col .city-list li::before {
        content: "·";
        position: absolute;
        left: 0;
        top: 0;
        color: var(--c-gold);
        font-size: 18px;
        line-height: 1.2;
      }
      .footer-col .city-list a {
        font-size: 12.5px;
      }
      .footer-col a {
        color: rgba(255, 255, 255, 0.65);
        transition: color 0.25s;
        font-size: 13px;
        letter-spacing: 0.01em;
      }
      .footer-col a:hover {
        color: var(--c-gold-2);
      }
      .footer-brand .logo {
        margin-bottom: 18px;
      }
      .footer-brand p {
        color: rgba(255, 255, 255, 0.6);
        line-height: 1.85;
        font-size: 12.5px;
        margin-bottom: 16px;
        letter-spacing: 0.01em;
      }
      .footer-brand .cert {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
        margin-top: 14px;
      }
      .footer-brand .cert span {
        padding: 5px 11px;
        background: rgba(201, 169, 97, 0.1);
        border: 1px solid rgba(201, 169, 97, 0.3);
        border-radius: 4px;
        color: var(--c-gold-2);
        font-size: 11px;
        letter-spacing: 0.1em;
        font-weight: 500;
      }

      .flinks {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 6px 12px;
      }
      .flinks a {
        font-size: 12.5px;
        color: rgba(255, 255, 255, 0.55);
        transition: color 0.25s;
        letter-spacing: 0.01em;
      }
      .flinks a:hover {
        color: var(--c-gold-2);
      }
      .flinks a::before {
        content: "›";
        margin-right: 6px;
        color: var(--c-gold);
        opacity: 0.7;
      }

      .footer-bottom {
        padding: 22px 0;
        margin-top: 32px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 12.5px;
        color: rgba(255, 255, 255, 0.5);
        letter-spacing: 0.01em;
      }
      .footer-bottom .icp a {
        color: rgba(255, 255, 255, 0.7);
        text-decoration: underline;
        text-underline-offset: 3px;
      }
      .footer-bottom .icp a:hover {
        color: var(--c-gold-2);
      }

      /* ========== 工具：渐显动画 ========== */
      .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition:
          opacity 0.8s ease,
          transform 0.8s ease;
      }
      .reveal.in {
        opacity: 1;
        transform: translateY(0);
      }

      /* ========== 响应式 ========== */
      @media (max-width: 1024px) {
        .hero-grid {
          grid-template-columns: 1fr;
          gap: 40px;
        }
        .hero-visual {
          height: 420px;
          max-width: 520px;
          margin: 0 auto;
          width: 100%;
        }
        .orbit-ring.r1 {
          width: 300px;
          height: 300px;
        }
        .orbit-ring.r2 {
          width: 400px;
          height: 400px;
        }
        .orbit-ring.r3 {
          width: 500px;
          height: 500px;
        }
        .ai-platform {
          width: 74px;
          height: 74px;
        }
        .ai-platform .ic {
          font-size: 24px;
        }
        .ai-platform .nm {
          font-size: 10px;
        }
        .ai-core {
          width: 130px;
          height: 130px;
        }
        .ai-core-text {
          font-size: 22px;
        }
        .svc-grid,
        .ind-grid {
          grid-template-columns: repeat(2, 1fr);
        }
        .pf-grid {
          grid-template-columns: repeat(4, 1fr);
        }
        .why-grid {
          grid-template-columns: repeat(2, 1fr);
        }
        .footer-top {
          grid-template-columns: 1fr 1fr;
          gap: 36px;
        }
        .intro-grid,
        .contact-grid {
          grid-template-columns: 1fr;
          gap: 40px;
        }
        .trust-bar .wrap {
          grid-template-columns: repeat(2, 1fr);
        }
        .flinks {
          grid-template-columns: repeat(2, 1fr);
        }
      }
      @media (max-width: 768px) {
        .section {
          padding: 64px 0;
        }
        .topbar .tb-left {
          font-size: 12px;
        }
        .topbar .tb-right {
          display: none;
        }
        .header .wrap {
          height: 64px;
        }
        .nav {
          display: none;
          position: absolute;
          top: 100%;
          left: 0;
          right: 0;
          background: #0a1628;
          flex-direction: column;
          padding: 20px;
          gap: 4px;
          border-top: 1px solid rgba(201, 169, 97, 0.18);
        }
        .nav.open {
          display: flex;
        }
        .nav a {
          padding: 12px 16px;
          width: 100%;
          border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .nav a::after {
          display: none;
        }
        .nav-cta {
          margin-top: 8px;
          justify-content: center;
        }
        .menu-btn {
          display: flex;
        }
        .logo-mark {
          font-size: 18px;
        }
        .logo-mark .biz {
          font-size: 16px;
        }
        .logo-tagline {
          display: none;
        }
        .hero {
          padding: 80px 0 60px;
          min-height: auto;
        }
        .hero h1 {
          font-size: 32px;
        }
        .hero .lead {
          font-size: 15px;
        }
        .hero-trust {
          gap: 20px;
        }
        .trust-item .num {
          font-size: 24px;
        }
        .intro-points {
          grid-template-columns: 1fr;
        }
        .svc-grid,
        .ind-grid {
          grid-template-columns: 1fr;
        }
        .pf-grid {
          grid-template-columns: repeat(3, 1fr);
        }
        .proc-grid {
          grid-template-columns: repeat(2, 1fr);
          gap: 32px 16px;
        }
        .proc-grid::before {
          display: none;
        }
        .why-grid {
          grid-template-columns: 1fr;
        }
        .contact-list {
          grid-template-columns: 1fr;
        }
        .contact-card,
        .qr-side {
          padding: 32px 24px;
        }
        .qr-grid {
          grid-template-columns: 1fr;
          text-align: center;
        }
        .qr-img {
          margin: 0 auto;
        }
        .footer-top {
          grid-template-columns: 1fr;
          gap: 32px;
        }
        .flinks {
          grid-template-columns: repeat(2, 1fr);
        }
        .footer-bottom {
          flex-direction: column;
          text-align: center;
        }
        .section-title {
          font-size: 26px;
        }
      }
      @media (max-width: 480px) {
        .pf-grid {
          grid-template-columns: repeat(2, 1fr);
        }
        .hero-cta {
          flex-direction: column;
          align-items: stretch;
        }
        .btn {
          justify-content: center;
        }
      }

      /* 无障碍：focus 状态 */
      a:focus-visible,
      button:focus-visible {
        outline: 2px solid var(--c-gold-2);
        outline-offset: 3px;
        border-radius: 4px;
      }

      /* 打印样式 */
      @media print {
        .header,
        .topbar,
        .hero-orb,
        .particles,
        .hero-lines,
        .footer-bottom {
          display: none;
        }
        body {
          color: #000;
          background: #fff;
        }
      }